Updates the example Android app now that I learned that only onLoad and onUnload need to be statically exported. Some other very minor fixes.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40796 4005530d-fff6-0310-9dd1-cebe43e6787f
LazDeviceAPIs: Adds an API to read the screen orientation

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40797 4005530d-fff6-0310-9dd1-cebe43e6787f